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Sphaerocarpales is a small order of liverworts. These plants are characterized by an involucre, which is a structure that surrounds each archegonium (the female reproductive organ). The family Sphaerocarpaceae, within this order, features gametophytes that are bilaterally symmetrical. The type genus, Sphaerocarpus, consists of liverworts with small, often orbicular thalli (plant bodies) that are typically many-lobed. The spores of Sphaerocarpus usually remain in tetrads (groups of four) when mature.123

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